let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8kpNzFPSUQpILMosBtKGBgZKsTrRSr6JRclAblB+aSpI2hQkHAsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Colonne 1" = _t, #"Colonne 2" = _t, #"Colonne 3" = _t]),
#"Type modifié" = Table.TransformColumnTypes(Source,{{"Colonne 1", type text}, {"Colonne 2", type text}, {"Colonne 3", Int64.Type}})
in
#"Type modifié"